Plaster-receiving board



Sept. 30 1924.

o. D. MCFARLAND PLASTER RECEIVING BOARD Filed Dec. 21. 1921 PatentSept., 3, H924..

iaiaraa OWEN D. MUFARLAND, OF CHICAGO, ILLINOIS, SSIGNOR O'F ONE-HALF T0l" t CUMFER, F CHICAGO, ILLINOIS.

BLASTER-RECEIVING BOARD.

Application filed December 21, 1921. serial no. 523,875.

v To all whom t may con/cem.'

Beit known that I, OWEN D. MoF'AiiLAND, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new andl useful Improvements in Plaster-ReceivingBoards, of which the following is a specification.

The invention relates to improvements in, plaster-receivin board. i

One of the o jects of the invention is to rovide a plasterreceivingboard reenforced by a metal fabric and in which the metal fabricA ishermetically sealed from atmospheric influences after the plaster hasbeen applied. I

Another object is to provide an impervious waterproof backing for aplaster receiving reticulate metal fabric in which the fabric isprimarily cemented to the backing before its application to a wall.

Another object is to provide a reticulate corrugated metal fabric and asaturated waterproof backing sheet to which the fabric is cemented by asuitable cementitious plastic, prior to application of plaster toprevent buckling or warping of the fabric and to protect it from rust.

A more specific object is to provide a reenforced plaster-receivingboard in which `parts of the mesh of an ex anded metal sheet areembedded in a coating of plastic asphalt overlying a saturatedwaterproof foundation sheet, leaving plaster-receiving o enings in thefabricated metal within willich to receive and hold the subsequently aplied plaster. j

nother object is generally to improve structures of this character.

Other objects and advantages will hereinafter appear from aconsiderationof the following description when taken in conjunction withthe drawings, wherein Fig. 1 shows a plan view of a fragmentl Fig. 4shows a preferred form of structure in which the metal fabric iscorrugated. In a/ll the views the same reference characters are employedto indicate similar parts.

The foundation sheet 10 may well be a sheet of roofin materialconsisting of felt impregnated with a mobile compound of an asphalticnature to render the sheet impervious to moisture and substantiallyweatherproof. Overlying the sheet 10 is a relatively thin coating 11 ofplastic asphalt into which is partially embedded a sheet of reticulatemetal fabric 12. In Fig. 2 I have shown the reticulate metal fabric tobe of the character known in trade as expanded metal. The sheet 12, ofreticulate metal, may first be coated with a relatively thin solution ofan asphaltic nature and, subsequently, part of the fabric is embedded inthe coating 11 overlying the sheet 10. To produce this eiiect the twosheets are passed thru a pair of rolls 14 and 15 that may be resilientlyheld by springs 16, or by any other suitable means, for pressing themetal fabric into the underlying coating of limited thickness. The sheet12 is impressed into the coating to an extent that will leave certainparts of the fabric open, as at 18, to form keys for the subsequentlyapplied plaster 19.

Preferably, the metal fabric 12, wire cloth or expanded metal, may becorrugated, as more clearly shown in Fig. 4, as at 20, the interveningportions 21, of the corrugated sheet, being depressed into theunderlying coating 11, until they are, preferably, substantially incontact with the sheet 10. By corrugating the metal sheet a series ofribs are thus formed which very greatly strengthens the article as awhole. When the plaster-receiving sheet is to be applied to studs orrafters of a building, the nails or staples are, preferably, passed thruthe portions 21 of the corrugations into the supporting structure. Ineither form of the structure the metal fabric will be entirely andcompletely submerged in the plaster 19 and the plastic coating 11, so asto be substantially hermetically sealed and protected against moistureand atmospheric inlluences, thereby preventing rust. The backing sheet10 also serves as a means for preventing dampness, and cold` air, frompassing thru the plastered wall, and furthermore the structure describedreenforces the plaster and prevents crackin to a large extent due to thesettling of the uilding and adds considerable strength tothe framestructure of the house. A plaster-receiving board of thi's characterpresents a maximum number of plaster-receiving keys, thereby holding theplaster firmly 1n place and prevents it from falling off in relativelylarge bodies from the plastered wall or ceiling.

The composite sheet, or article, may be made in definite lengths or acontinuously long sheet may be coiled into suitable size rolls forshipment and storage.

Having described my invention what I claim as new and desire to secureby Letters Patent, is l 1. An article of manufacture' comprisn acorrugated reticulate sheet of expande metal; an asphalt saturated sheetof felt and a coating of plastic asphalt of uniform thickness betweenthe sheets to hold the sheets together.

2. An article of manufacture comprisin a sheet of expanded metal fabric;an aspha t saturated sheet and a coating of plastic asphalt of uniformthickness between the sheets in which parts of the metal sheet areembedded.

In testimony whereof I hereunto subscribe my name.

OWEN D. MGFARLAND.

